# -*- coding: utf-8 -*-

#This file is part of pyLot library.
#
# pyLot is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# pyLot is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with pyLot.  If not, see <http://www.gnu.org/licenses/>.

__author__ = u'Pierre Puiseux, Guillaume Baty'
__copyright__ = u"Copyright 2011-2012 (C) andheo, Université de Pau et des Pays de l'Adour"
__credits__ = [u'Pierre Puiseux', u'Guillaume Baty']
__license__ = "GNU Lesser General Public License"

__all__ = ['XmlCollectionWriter']

from pyLot.dataconverter import DataWriter
from pyLot.core import container_to_xml, ENCODING

from StringIO import StringIO

class XmlCollectionWriter(DataWriter):

  identifier = 'pyLot.writer.xml_collection'
  datarepr_id = 'pyLot.repr.container'
  dataformat_id = 'pyLot.format.xml_collection'

  def __init__(self, dataformat=None, datarepr=None):
    DataWriter.__init__(self, dataformat=dataformat, datarepr=datarepr)

  def stream(self, data):
    stream = StringIO()
    tmp_stream = StringIO()

    container_to_xml(data, tmp_stream)
    tmp_stream.pos = 0

    for l in tmp_stream :
      stream.write(l.decode(ENCODING))

    stream.pos = 0
    return stream

  def iterate(self, data):
    for line in self.stream(data) :
      yield line
